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Sagot :

A = // (expression de départ)
A = { -2(b+6)-(3b+8)=0
{ -3(-2b-6)*(-2a-10)*(5a-2,5)=0
A = {b= -4
{ -3(-2b-6)*(-2a-10)*(5a-2,5)=0
A = { b=-4
{ -3(-2*(-4)-6)*(-2a-10)*(5a-2,5)=0
A = { b= -4
{ a= -5
a= 1/2

(a1, b1) = (-5, -4)
(a2, b2) = (1/2, -4)

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